CN106183318B - A kind of boring backing plate and preparation method thereof - Google Patents
A kind of boring backing plate and preparation method thereof Download PDFInfo
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- CN106183318B CN106183318B CN201610593470.2A CN201610593470A CN106183318B CN 106183318 B CN106183318 B CN 106183318B CN 201610593470 A CN201610593470 A CN 201610593470A CN 106183318 B CN106183318 B CN 106183318B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B29/00—Layered products comprising a layer of paper or cardboard
- B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B29/005—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to another layer of paper or cardboard layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/02—Material of vegetable origin
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/47—Condensation polymers of aldehydes or ketones
- D21H17/49—Condensation polymers of aldehydes or ketones with compounds containing hydrogen bound to nitrogen
- D21H17/51—Triazines, e.g. melamine
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/02—Composition of the impregnated, bonded or embedded layer
- B32B2260/028—Paper layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/04—Impregnation, embedding, or binder material
- B32B2260/046—Synthetic resin
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Dispersion Chemistry (AREA)
- Phenolic Resins Or Amino Resins (AREA)
- Paper (AREA)
- Laminated Bodies (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The present invention discloses a kind of boring backing plate and preparation method thereof, and method includes step:Prepare modified urea-formaldehyde resin；Paper is impregnated in modified urea-formaldehyde resin, is 200 ~ 230 DEG C in temperature, under the conditions of speed is 20 ~ 25m/min, gum dipped paper is made；Several gum dipped papers are overlapped, are 110 ~ 140 DEG C in temperature, pressure suppresses 90 ~ 120min under the conditions of being 4 ~ 6MPa, obtains backing plate.Backing plate of the present invention is to be prepared by modified urea-formaldehyde resin, paper through gum dipping process hot pressing.The modified urea-formaldehyde resin glue time of the invention shortens, processing time can be effectively improved, improves production efficiency, and modified urea-formaldehyde resin is conducive to reduce bow warping, borehole cuttings adherency drill point is avoided to cause consent and broken needle simultaneously, can also reduce material cost to a certain degree.Plate Lauxite system because of its thermosetting resin characteristic and well in cementability, can guarantee the uniformity of plate and drilling quality.
Description
Technical field
The present invention relates to the boring backing plate field of printed circuit board more particularly to a kind of boring backing plate and its preparation sides
Method.
Background technology
The boring backing plate of printed circuit board, it is desirable that have good appearance requirement and drilling performance and well in cost performance.It is existing
Phenolic sheet, epoxy laminate, conventional Lauxite laminate are influenced by prices of raw materials rise on the market,
Cost of manufacture is caused to rise, and there are warpage is larger, drilling drill point twines silk and leads to problems such as consent for existing backing plate.
Therefore, the prior art has yet to be improved and developed.
The content of the invention
In view of above-mentioned deficiencies of the prior art, it is an object of the invention to provide a kind of boring backing plate and its preparation sides
Method, it is intended to solve existing backing plate there are cost of manufacture rising, warpage is larger, drilling drill point twines silk leads to problems such as consent.
Technical scheme is as follows：
A kind of preparation method of boring backing plate, wherein, including step：
A, modified urea-formaldehyde resin is prepared；
B, paper is impregnated in modified urea-formaldehyde resin, is 200 ~ 230 DEG C in temperature, speed is 20 ~ 25m/min conditions
Under, gum dipped paper is made；
C, several gum dipped papers are overlapped, temperature be 110 ~ 140 DEG C, pressure be 4 ~ 6MPa under the conditions of compacting 90 ~
120min obtains backing plate.
The preparation method of the boring backing plate, wherein, by weight percentage, the modified urea-formaldehyde resin be by
42%-46% formaldehyde, 12%-17% methanol, 14%-16% urea, 2%-3% crow networks tropine, melamine 6%-7%, 10%-15% filler,
4%-6% p-methyl benzenesulfonic acid, 4%-5% solvents are prepared.
The preparation method of the boring backing plate, wherein, the filler for aluminium powder, talcum powder, one kind in wood powder or
It is a variety of.
The preparation method of the boring backing plate, wherein, step A is specifically included：
A1, according to above-mentioned formula, first add in formaldehyde, start to stir with the rotating speed of 50-100r/min, 15-35 DEG C of temperature adds
Enter black network tropine, melamine, urea, obtain material；
A2, start to warm up, material is warming up to 70-75 DEG C；
A3, heat preservation add in methanol after 29 ~ 31 minutes, then are warming up to 70-73 DEG C, and keep the temperature 1.3 ~ 1.7 it is small when, after the time arrives
Add in solvent and water flowing cooling；
A4, stirring cooling 38 ~ 42min blowings；
A5, first add in again in the feed liquid that filler is released to step A4, controlling mixing speed, temperature is room for 60-80r/min
Interior room temperature；
A6, p-methyl benzenesulfonic acid is stirring evenly and then adding into, temperature is normal temperature laboratory, stirs 8 ~ 12min, controls the mixing speed to be
80-100r/min obtains modified urea-formaldehyde resin.
The preparation method of the boring backing plate, wherein, in step A2, material is warming up to 70-75 in 30 minutes
℃。
The preparation method of the boring backing plate, wherein, in step A4, mixing speed 60r/m.
The preparation method of the boring backing plate, wherein, the paper is brown paper, balance paper, bleached wood pulp paper, titanium
One or more in blank sheet of paper.
The preparation method of the boring backing plate, wherein, in step B, by weight percentage, gum dipped paper obtained
Gel content 35%-55%, volatile matter 7%-9%, soluble 87%-95%.
A kind of boring backing plate, wherein, the preparation method of use as above any boring backing plate is prepared.
Advantageous effect：Backing plate of the present invention is to be prepared by modified urea-formaldehyde resin, paper through gum dipping process hot pressing.The modification
The Lauxite gelatinization time shortens, and can effectively improve processing time, improves production efficiency, and the modified urea-formaldehyde resin is conducive to subtract
Small bow warping, while borehole cuttings adherency drill point is avoided to cause consent and broken needle, material cost can be also reduced to a certain degree.Plate
Timber-used Lauxite system because of its thermosetting resin characteristic and well in cementability, can guarantee the uniformity of plate and drilling product
Matter.
Specific embodiment
The present invention provides a kind of boring backing plate and preparation method thereof, to make the purpose of the present invention, technical solution and effect
Clearer, clear and definite, the present invention is described in more detail below.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
The preparation method of a kind of boring backing plate of the present invention, including step：
A, modified urea-formaldehyde resin is prepared；
B, paper is impregnated in modified urea-formaldehyde resin, is 200 ~ 230 DEG C in temperature, speed is 20 ~ 25m/min conditions
Under, gum dipped paper is made；
Preferably, the paper can be the one or more in brown paper, balance paper, bleached wood pulp paper, titanium white paper.It presses
Weight percent meter, the gel content 35%-55% of gum dipped paper obtained, volatile matter 7%-9%, soluble 87%-95%.The solubility
Refer to soluble solid, that is, solable matter.
C, several gum dipped papers are overlapped, temperature be 110 ~ 140 DEG C, pressure be 4 ~ 6MPa under the conditions of compacting 90 ~
120min obtains backing plate.
Backing plate of the present invention is to be prepared by modified urea-formaldehyde resin, paper through gum dipping process hot pressing.The modified urea of the invention
Urea formaldehyde gel time shortens, and can effectively improve processing time, improves production efficiency, and modified urea-formaldehyde resin is conducive to reduce plate
Material warpage, while borehole cuttings adherency drill point is avoided to cause consent and broken needle, material cost can be also reduced to a certain degree.Plate is used
Lauxite system because of its thermosetting resin characteristic and well in cementability, can guarantee the uniformity of plate and drilling quality.
Specifically, in step C, 8-10 gum dipped papers are overlapped, it is further excellent the backing plate of thickness 1.4-1.5mm is made
Change the performance of backing plate.
Specifically, by weight percentage, the modified urea-formaldehyde resin be by 42%-46% formaldehyde, 12%-17% methanol,
14%-16% urea, 2%-3% crow networks tropine, melamine 6%-7%, 10%-15% filler, 4%-6% p-methyl benzenesulfonic acid, 4%-5% solvents
（Such as diethylene glycol）It is prepared.Preferably, filler of the present invention can be but be not limited in aluminium powder, talcum powder, wood powder
It is one or more.Being added with for above-mentioned filler is beneficial to reduce bow warping in modified urea-formaldehyde resin of the present invention, while avoids drilling
Chip adherency drill point causes consent and broken needle, can also reduce material cost to a certain degree.
The preparation method of modified urea-formaldehyde resin of the present invention is described in detail below.Specifically, step A is specifically included：
A1, according to above-mentioned formula, first add in formaldehyde, start to stir with the rotating speed of 50-100r/min, 15-35 DEG C of temperature adds
Enter black network tropine, melamine, urea, obtain material；Preferably, add in black network tropine to material pH be 8.5.
A2, steam section door is opened, 1 KG/C ㎡ air pressures is added in toward reaction kettle housing.It starts to warm up, material is warming up to 70-
75 DEG C (reaction solution starts transparent at 60 DEG C, and pH value should be 8-8.5 at this time)；Preferably, material is warming up to 70- in 30 minutes
75℃；
A3, heat preservation 29 ~ 31 minutes（Such as 30 minutes）Methanol is added in afterwards (if vacuum suck, air is switched on after sucking
Section door), then be warming up to 70-73 DEG C, and keep the temperature 1.3 ~ 1.7 it is small when（As 1.5 it is small when）, the time adds in solvent after（Such as diethyl two
Alcohol）And water flowing cools down；
A4,38 ~ 42min of stirring cooling（Such as 40min）Blowing；Preferably, mixing speed 60r/m；
A5, first add in again in the feed liquid that filler is released to step A4, control mixing speed 60-80r/min（Such as 80r/
min）, temperature is normal temperature laboratory；
A6, p-methyl benzenesulfonic acid is stirring evenly and then adding into, temperature is normal temperature laboratory, stirs 8 ~ 12min（Such as 10min）, control
Mixing speed is 80-100r/min（Such as 90r/min）, obtain modified urea-formaldehyde resin.
Based on the above method, the present invention also provides a kind of boring backing plates, use as above any boring pad
The preparation method of plate is prepared.Backing plate warpage is small made from the method for the present invention, and drilling chip removal is good, and drill point is without twining silk.
Below by specific embodiment, the present invention is described in detail.
Embodiment 1
1）, modified urea-formaldehyde resin preparation
By weight percentage, 44% formaldehyde is first added in, starts mixing speed 80r/min, 20 DEG C of temperature adds in 2.5% crow
Network tropine surveys pH value as 8.5,6.5% melamine, 15% urea；
Steam section door is opened, 1 KG/C ㎡ air pressures is added in toward reaction kettle housing, starts to warm up, by material liter in 30 minutes
Temperature is to 70 DEG C (reaction solution starts transparent at 60 DEG C, and pH value should be 8-8.5 at this time)；
Heat preservation adds in 14% methanol (if vacuum suck, air section door is switched on after sucking) in 30 minutes, then is warming up to 70
DEG C, and keep the temperature 1.5 it is small when, the time added in after 4% diethylene glycol and water flowing cooling；
Stirring cooling 40min blowings, mixing speed 60r/m；
10% aluminium powder is first added in again into the feed liquid of above-mentioned releasing, and mixing speed 80r/min, temperature is normal temperature laboratory；
4% p-methyl benzenesulfonic acid is stirring evenly and then adding into feed liquid, temperature is normal temperature laboratory, stirs 10min, mixing speed
80r/min obtains modified urea-formaldehyde resin.
2）, paper impregnation
By paper impregnation steps 1）Modified urea-formaldehyde resin obtained under the conditions of 200 DEG C of temperature, speed 20m/min, is made
The gel content 40% of gum dipped paper, volatile matter 7%, solubility 87%.
3）, compacting
By step 2）Gum dipped paper overlapping obtained, in 120 DEG C of temperature, 4MPa pressure under the conditions of the 90min pressing times, is pressed
Finished product backing plate is made.
As a result：Backing plate angularity ＜ 0.5%, thickness deviation ± 0.1mm, peel strength 13.5N/cm, drilling chip removal are good
Good, drill point is without twining silk.
Embodiment 2
1）, modified urea-formaldehyde resin preparation
By weight percentage, 42% formaldehyde is first added in, starts mixing speed 90r/min, 20 DEG C of temperature adds in 2% black network
Tropine surveys pH value as 8.5,6% melamine, 14% urea；
Steam section door is opened, 1 KG/C ㎡ air pressures is added in toward reaction kettle housing, starts to warm up, by material liter in 30 minutes
Temperature is to 75 DEG C (reaction solution starts transparent at 60 DEG C, and pH value should be 8-8.5 at this time).
Heat preservation adds in 17% methanol (if vacuum suck, air section door is switched on after sucking) in 30 minutes, then is warming up to 70
DEG C, and keep the temperature 1.5 it is small when, the time added in after 5% diethylene glycol and water flowing cooling；
Stirring cooling 40min blowings, mixing speed 60r/m.
10% talcum powder is first added in again into the feed liquid of above-mentioned releasing, and mixing speed 80r/min, temperature is normal temperature laboratory；
4% p-methyl benzenesulfonic acid is stirring evenly and then adding into feed liquid, temperature is normal temperature laboratory, stirs 10min, mixing speed
80r/min obtains modified urea-formaldehyde resin.
2）, paper impregnation
By paper impregnation steps 1）Modified urea-formaldehyde resin obtained under the conditions of 200 DEG C of temperature, speed 25m/min, is made
The gel content 38% of gum dipped paper, volatile matter 8%, solubility 89%.
3), suppress
By step 2）Gum dipped paper overlapping obtained, in 120 DEG C of temperature, 4MPa pressure under the conditions of the 100min pressing times, is pressed
Finished product backing plate is made.
As a result：Backing plate angularity ＜ 0.6%, thickness deviation ± 0.1mm, peel strength 13N/cm, drilling chip removal is good,
Drill point is without twining silk.
Embodiment 3：
1）, modified urea-formaldehyde resin preparation
By weight percentage, 46% formaldehyde is first added in, starts mixing speed 90r/min, 30 DEG C of temperature adds in 3% black network
Tropine surveys pH value as 8.5,7% melamine, 14% urea；
Steam section door is opened, 1 KG/C ㎡ air pressures is added in toward reaction kettle housing, starts to warm up, by material liter in 30 minutes
Temperature is to 73 DEG C (reaction solution starts transparent at 60 DEG C, and pH value should be 8-8.5 at this time).
Heat preservation adds in 12% methanol (if vacuum suck, air section door is switched on after sucking) in 30 minutes, then is warming up to 70
DEG C, and keep the temperature 1.5 it is small when, the time added in after 4% diethylene glycol and water flowing cooling；
Stirring cooling 40min blowings, mixing speed 60r/m；
The aluminium powder and wood powder mixing for first adding in total weight 10% again fill out object into the feed liquid of above-mentioned releasing, mixing speed 70r/
Min, temperature are normal temperature laboratory；
4% p-methyl benzenesulfonic acid is stirring evenly and then adding into feed liquid, temperature is normal temperature laboratory, stirs 10min, mixing speed
90r/min obtains modified urea-formaldehyde resin.
2）, paper impregnation
By paper impregnation steps 1）Modified urea-formaldehyde resin obtained under the conditions of 220 DEG C of temperature, speed 23m/min, is made
The gel content 41% of gum dipped paper, volatile matter 8%, solubility 87%.
3）, compacting
By step 2）Gum dipped paper overlapping obtained, in 120 DEG C of temperature, 6MPa pressure under the conditions of the 120min pressing times, is pressed
Finished product backing plate is made.
As a result：Backing plate angularity ＜ 0.6%, thickness deviation ± 0.1mm, peel strength 15.3N/cm, drilling chip removal are good
Good, drill point is without twining silk.
In conclusion a kind of boring backing plate of the present invention and preparation method thereof, backing plate of the present invention is by modified urea-formaldehyde tree
Fat, paper are prepared through gum dipping process hot pressing.The modified urea-formaldehyde resin glue time of the invention shortens, and can effectively improve processing procedure
Time improves production efficiency, and modified urea-formaldehyde resin is conducive to reduce bow warping, while borehole cuttings adherency drill point is avoided to lead
Consent and broken needle are caused, can also reduce material cost to a certain degree.Plate Lauxite system, because of its thermosetting resin characteristic and
Well in cementability, the uniformity of plate and drilling quality can guarantee.
It should be appreciated that the application of the present invention is not limited to the above, it for those of ordinary skills, can
To be improved or converted according to the above description, all these modifications and variations should all belong to the guarantor of appended claims of the present invention
Protect scope.
Claims (7)
1. a kind of preparation method of boring backing plate, which is characterized in that including step：
A, modified urea-formaldehyde resin is prepared；
B, paper is impregnated in modified urea-formaldehyde resin, is 200 ~ 230 DEG C in temperature, under the conditions of speed is 20 ~ 25m/min, system
Obtain gum dipped paper；
C, several gum dipped papers are overlapped, is 110 ~ 140 DEG C in temperature, pressure suppresses 90 ~ 120min under the conditions of being 4 ~ 6MPa, obtains
To backing plate；
In the step C, 8-10 gum dipped papers are overlapped, the backing plate of thickness 1.4-1.5mm is made；
By weight percentage, the modified urea-formaldehyde resin be by 42%-46% formaldehyde, 12%-17% methanol, 14%-16% urea,
2%-3% crow networks tropine, melamine 6%-7%, 10%-15% filler, 4%-6% p-methyl benzenesulfonic acid, 4%-5% solvents are prepared；
Step A is specifically included：
A1, according to above-mentioned formula, first add in formaldehyde, start to stir with the rotating speed of 50-100r/min, 15-35 DEG C of temperature adds in crow
Network tropine, melamine, urea, obtain material；
A2, start to warm up, material is warming up to 70-75 DEG C；
A3, heat preservation add in methanol after 29 ~ 31 minutes, then are warming up to 70-73 DEG C, and keep the temperature 1.3 ~ 1.7 it is small when, the time adds in after
Solvent and water flowing cooling；
A4, stirring cooling 38 ~ 42min blowings；
A5, first add in again in the feed liquid that filler is released to step A4, control mixing speed as 60-80r/min, temperature is indoor normal
Temperature；
A6, p-methyl benzenesulfonic acid is stirring evenly and then adding into, temperature is normal temperature laboratory, stirs 8 ~ 12min, and it is 80- to control mixing speed
100r/min obtains modified urea-formaldehyde resin.
2. the preparation method of boring backing plate according to claim 1, which is characterized in that the filler is aluminium powder, talcum
One or more in powder, wood powder.
3. the preparation method of boring backing plate according to claim 1, which is characterized in that in step A2, in 30 minutes
Material is warming up to 70-75 DEG C.
4. the preparation method of boring backing plate according to claim 1, which is characterized in that in step A4, mixing speed is
60r/m。
5. the preparation method of boring backing plate according to claim 1, which is characterized in that the paper is brown paper, puts down
One or more in paper, bleached wood pulp paper, the titanium white paper of weighing.
6. the preparation method of boring backing plate according to claim 1, which is characterized in that in step B, by weight percentage
Meter, the gel content 35%-55% of gum dipped paper obtained, volatile matter 7%-9%, soluble 87%-95%.
7. a kind of boring backing plate, which is characterized in that using the preparation side of the boring backing plate as described in claim 1 ~ 6 is any
Method is prepared.
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| CN106827771A (en) * | 2016-12-20 | 2017-06-13 | 湖南柳鑫电子新材料有限公司 | A kind of high rigidity melamine sheeting caps and preparation method thereof |
| CN106739374B (en) * | 2016-12-29 | 2019-03-05 | 深圳市天龙兴业科技有限公司 | Soft jumping through rings cold insulation punching and the cold punching plate technique |
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| CN103950057B (en) * | 2014-04-22 | 2016-04-27 | 深圳市柳鑫实业股份有限公司 | A kind of boring lamination backing plate and preparation method thereof |
| CN103935105B (en) * | 2014-04-22 | 2016-04-27 | 深圳市柳鑫实业股份有限公司 | Boring compound backing plate of a kind of PCB and preparation method thereof |
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